Melissa Rivers 'preparing to sue'

Joan Rivers' daughter Melissa Rivers is preparing to file a medical malpractice and wrongful death lawsuit.

The TV producer, who was devastated when the 81-year-old comedienne died from "predictable" surgical complications while undergoing a minor operation on her vocal cords last month, has reportedly hired top US law firm Gair, Gair, Conason, Steigman, Mackauf, Bloom & Rubinowitz to represent her in a multi-million dollar court battle against the Yorkville Endoscopy Clinic in Manhattan, New York City and the doctors that treated Joan there before her death on September 4.